Bootstrap 4：列之间没有空格[重复]

Question

所以我在引导程序 4 中的列存在这个问题。我编写了这段代码，但在浏览器中，3 个块之间没有空格。每个块有 4 列，但它们之间没有边距。

我尝试更改引导程序的 4 行以进行填充，但这使事情变得更糟，但是，这是 codepen 中附加的代码。您可以实时查看结果，并且可以根据需要对其进行编辑。

您可以在此链接中看到它：https://codepen.io/PlatoCode/pen/erWaXg

<section class="jobs">
 <div class="container">
      <div class="row">
           <div class="col-md-4 single_job">
                <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                <h5>Web Designer</h5>
                <p>Development Team</p>
                <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
           </div>
           <div class="col-md-4 single_job">
                <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                <h5>Web Designer</h5>
                <p>Development Team</p>
                <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
           </div>
           <div class="col-md-4 single_job">
                <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                <h5>Web Designer</h5>
                <p>Development Team</p>
                <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
           </div>
      </div>
 </div>

CSS :-

 /*----- General ----*/
 html { -webkit-font-smoothing: antialiased;
  }
 body {
    font-family: "Open Sans", sans-serif;
    font-weight: 400;
    color: #1c1c1c;
    height: 100%;
    min-height: 100%;
 }

 h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    line-height: 1;
    color: #1c1c1c;
    margin-top: 0
 }

 h1 {
    font-size: 2.813em;
 }

 h2 {
    font-size: 2.5em;
 }

 h3 {
    font-size: 2em;
 }

 h4 {
    font-size:  1.438em;
 }

 h5 {
    font-size: 1.25em;
 }

 h6 {
    font-size: 1.125em;
 }

 ul,
 ol {
   list-style: none;
   line-height: 1.85714286em;
 }

 p {
    font-family: 'Roboto';
    font-size: 0.938em;
    color: #889094;
 }

 .btn {
    display: inline-block;
    background-color: #50b1fc;
    text-align: center;
    cursor: pointer;
    color: #fff;
    border-radius: 38px;
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    overflow: hidden;
    position: relative;
    z-index: 0;
    vertical-align: middle;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    text-decoration: none;
    text-shadow: none;
    padding: 10px 30px;
 }

 .btn:hover {
    color: white;
 }

 .btn2 {
    display: inline-block;
    background-color: #fff;
    text-align: center;
    cursor: pointer;
    color: #010d2f;
    border-radius: 10px;
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    overflow: hidden;
    position: relative;
    z-index: 0;
    vertical-align: middle;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    text-decoration: none;
    text-shadow: none;
    padding: 10px 30px;
 }

 .btn2:hover {
    color: #010d2f;
 }


 /* Jobs */

 .single_job {
    background-color: #fff;
    -webkit-box-shadow: 0 0 38px rgba(0,0,0,.08);
    -moz-box-shadow: 0 0 38px rgba(0,0,0,.08);
    box-shadow: 0 0 38px rgba(0,0,0,.08);
    padding: 35px 25px;
 }

 .single_job p {
    margin-bottom: 25px;
 }
 .single_job h5 {
    margin-top: 5px;
 }

Answer 1

你会在更大的屏幕上看到最好的结果
我添加了div 并使用引导空间
有关引导空间的更多详细信息：https://getbootstrap.com/docs/4.0/utilities/spacing/

html { -webkit-font-smoothing: antialiased;
 }
body {
	font-family: "Open Sans", sans-serif;
	font-weight: 400;
	color: #1c1c1c;
	height: 100%;
	min-height: 100%;
}

h1, h2, h3, h4, h5, h6 {
	font-family: 'Montserrat', sans-serif;
	line-height: 1;
	color: #1c1c1c;
	margin-top: 0
}

h1 {
	font-size: 2.813em;
}

h2 {
	font-size: 2.5em;
}

h3 {
	font-size: 2em;
}

h4 {
	font-size:  1.438em;
}

h5 {
	font-size: 1.25em;
}

h6 {
	font-size: 1.125em;
}

ul,
ol {
  list-style: none;
  line-height: 1.85714286em;
}

p {
	font-family: 'Roboto';
	font-size: 0.938em;
	color: #889094;
}

.btn {
	display: inline-block;
	background-color: #50b1fc;
	text-align: center;
	cursor: pointer;
	color: #fff;
	border-radius: 38px;
	font-family: 'Montserrat', sans-serif;
	font-size: 11px;
	letter-spacing: 1px;
	text-transform: uppercase;
	overflow: hidden;
	position: relative;
	z-index: 0;
	vertical-align: middle;
	-moz-user-select: none;
	-webkit-user-select: none;
	user-select: none;
	text-decoration: none;
	text-shadow: none;
	padding: 10px 30px;
}

.btn:hover {
	color: white;
}

.btn2 {
	display: inline-block;
	background-color: #fff;
	text-align: center;
	cursor: pointer;
	color: #010d2f;
	border-radius: 10px;
	font-family: 'Montserrat', sans-serif;
	font-size: 11px;
	letter-spacing: 1px;
	text-transform: uppercase;
	overflow: hidden;
	position: relative;
	z-index: 0;
	vertical-align: middle;
	-moz-user-select: none;
	-webkit-user-select: none;
	user-select: none;
	text-decoration: none;
	text-shadow: none;
	padding: 10px 30px;
}

.btn2:hover {
	color: #010d2f;
}


/* Jobs */

.single_job {
	background-color: #fff;
	-webkit-box-shadow: 0 0 38px rgba(0,0,0,.08);
	-moz-box-shadow: 0 0 38px rgba(0,0,0,.08);
	box-shadow: 0 0 38px rgba(0,0,0,.08);
	padding: 35px 25px;
}

.single_job p {
	margin-bottom: 25px;
}
.single_job h5 {
	margin-top: 5px;
}

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<section class="jobs">
     <div class="container">
          <div class="row">
               <div class="col-md-4 p-3">
                 <div class="single_job">
                    <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                    <h5>Web Designer</h5>
                    <p>Development Team</p>
                    <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
                 </div>
               </div>
               <div class="col-md-4 p-3">
                 <div class="single_job">
                    <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                    <h5>Web Designer</h5>
                    <p>Development Team</p>
                    <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
                   </div>
               </div>
               <div class="col-md-4 p-3">
                  <div class="single_job">
                    <span style="color: rgb(232, 61, 98);">toronto, canada</span>
                    <h5>Web Designer</h5>
                    <p>Development Team</p>
                    <a href="#" class="btn" style="background-color: rgb(232,61,98);">Apply Now</a>
               </div>
                  </div>
          </div>
     </div>
</section>